蹄痕茎属在内蒙古乌达地区的发现及其意义

Discovery and Significance of the Genus Caulopteris from the Wuda Area of Inner Mongolia 

描述了发现于我国内蒙古乌达地区早二叠世早期山西组新种乌达蹄痕茎（Ｃａｕｌｏｐｔｅｒｉｓｗｕｄａｅｎｓｉｓｓｐ．ｎｏｖ．ＳｕｎｅｔＤｅｎｇ）。蹄痕茎为石炭纪和二叠纪树蕨植物的茎干印痕化石，多分布于欧美植物区，在华夏植物区则非常少见。本新种的发现为蹄痕茎植物的地理分布、生态和演化提供了重要的证据。

Caulopteris wudaensis sp. nov. was collected from the Shanxi Formation of the early Early Permian in the Wuda area of Inner Mongolia, China. The genus Caulopteris is considered as the impression fossils of the tree fern stems. Most of the species under the genus Caulopteris are mainly distributed in the Euramerican Province, whereas they are very rare in the Cathaysian Province. The discovery of the new species will provide some important evidences for the geographical distribution, ecology and evolution of the genus Caulopteris.